package com.wanggsx.library.base.views;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;

public class RoundedImageView extends ImageView {

	public RoundedImageView(Context context) {
		super(context);
	}

	public RoundedImageView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	public RoundedImageView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
	}

	@Override
	protected void onDraw(Canvas canvas) {
		Drawable drawable = getDrawable();

		if (drawable == null) {
			return;
		}

		if (getWidth() == 0 || getHeight() == 0) {
			return;
		}

		Bitmap tempBitmap = ((BitmapDrawable) drawable).getBitmap();
		if (tempBitmap == null) {
			return;
		}
		Bitmap bitmap = tempBitmap.copy(Config.ARGB_8888, true);

		int w = getWidth();
		int h = getHeight();

		Bitmap roundBitmap = getCroppedBitmap(bitmap, w > h ? h : w);
		canvas.drawBitmap(roundBitmap, 0, 0, null);
	}

	/**
	 * 获取圆形的Bitmap
	 * 
	 * @param bmp
	 * @param radius
	 * @return
	 */
	public static Bitmap getCroppedBitmap(Bitmap bmp, int radius) {
		Bitmap targetBitmap;

		if (bmp.getWidth() != radius || bmp.getHeight() != radius) {
			// 设置成可以缩放的Bitmap
			targetBitmap = Bitmap
					.createScaledBitmap(bmp, radius, radius, false);
		} else {
			targetBitmap = bmp;
		}

		Bitmap output = Bitmap.createBitmap(targetBitmap.getWidth(),
				targetBitmap.getHeight(), Config.ARGB_8888);
		Canvas canvas = new Canvas(output);

		final Paint paint = new Paint();
		// 设置画布
		final Rect rect = new Rect(0, 0, targetBitmap.getWidth(),
				targetBitmap.getHeight());

		paint.setAntiAlias(true);
		paint.setFilterBitmap(true);
		paint.setDither(true);
		canvas.drawARGB(0, 0, 0, 0);
		paint.setColor(Color.parseColor("#BAB399"));
		canvas.drawCircle(targetBitmap.getWidth() / 2 + 0.7f,
				targetBitmap.getHeight() / 2 + 0.7f,
				targetBitmap.getWidth() / 2 + 0.1f, paint);
		paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
		canvas.drawBitmap(targetBitmap, rect, rect, paint);

		return output;
	}
}
